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PROSPECTIVE SAFRAN: POWERING THE NEXT CHAPTER OF AVIATION HISTORY The near-term objective is to test and refine these technologies so that we’re ready in the longer term to deliver dependable, versatile, high-performance solutions for any type of commercial aircraft. Why the shift to electric While the increasing electrification of non-propulsive functions has driven the evolution of airplanes and helicopters over the last few decades, the electrification of propulsion systems promises a revolution: a radically new way to design aircraft, including aerodynamics and even operating modes. The innovation and research projects being conducted in electric propulsion herald a fundamental shift in the aerospace landscape in the decades ahead, including much greater diversity in what flying machines will look like and how they’ll be used. This diversity will be largely determined by the extent to which electricity is the primary source of propulsive power. Some aircraft will use micro hybridization: a combination of current combustion engines with small, smart electric motors, like the start-stop systems now common in automobiles. A similar system has been developed by Safran for the Airbus Helicopters Racer high-speed rotary-wing demonstrator. This technology allows the pilot to shut down one of the two engines during the cruise phases. Then, whenever necessary — when landing, for example, or if the pilot needs to gain airspeed or perform an emergency maneuver — the engine is restarted at full power by an electric motor. Full hybridization will involve developing more powerful systems combining combustion engines and electric generators that will directly provide lift and forward thrust for the aircraft, as well as power its non-propulsive functions. The final destination will be all-electric propulsion, where conventional combustion engines will be completely superseded by a purely electric power source. A growing number of projects exploring the many possibilities are being conducted around the world, led by established industry players and startups alike. Amid the profusion of announcements and claims, Safran is pursuing a pragmatic approach to innovation. The company is developing and offering new needs-responsive solutions, from electrification of conventional aircraft to propulsion systems for new platform concepts, such as multi-rotors vertical takeoff and landing aircraft (VTOL). 100+ hybrid or electric propulsion aircraft PROJECTS worldwide propulsion? Hybrid or all-electric propulsion offers significant benefits: 1. Enhanced performance Huge technological progress has been made with latest-generation combustion engines, and further advances are possible by optimizing architectures, materials and coatings to boost performance. Hybrid layouts are another way to reduce weight, fuel burn and environmental impact, especially by avoiding the need to design the main combustion engine to meet maximum power requirements, for example at takeoff. 2. More reliable operation More-electric architectures are more robust and require less maintenance. Smart electronic management makes them potentially more compatible with new digital technologies, allowing data to be collected and analyzed for greater automation, optimized flight and better failure prediction and management. 3. New markets By increasing the number of electric motors, certain architectures such as multi-rotor VTOLs are inherently much safer and could open up a host of new uses in urban and suburban areas, as well as bringing this kind of flying to many more people, thanks to manually-assisted or fully-automated operation. 18 19PDF Image | SAFRAN AND AVIATIONS ELECTRIC FUTURE
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